Adjustable die for punch-presses



A. JOHNSON. ADJUSTABLE DIE FOR PUNCH PRESSES. APPLICATION FILED JUNE :2, 1920.

1,370, 1 1 6, PateqtedMar. 1, 1921.

62mm Mu,

INVENTOR.

ARON JOHNSON, OF BROOKLYN, NEW YORK.

ADJUSTABLE DIE non runcH-rnnssns.

Specification of Letters Patent.

Application filed June 12, 1920. Serial No. 388,671.

To all whom it may concern.

Be it known that I, ARON JOHNSON, a citizen of the United States, residing at the borough of Brooklyn, New York city, 1n

the county of New York and State of New York, have invented certain new and useful Improvements in Adjustable Dies for Punch-Presses, of which the following is a specification.

My invention relates to dies for use inmetal punching presses and it is my object to provide such dies with means for adjusting the same quickly and easily while in the press and to retain such adjustment after it is made.

I have shown my invention applied to a female die used in maklng crown capsfor bottles and in the drawing Figure 1 1s a sectional view of my improved die with the forming member at its lowermost limit of adjustment; Fig. 2 a top view of the d1e;

and Fig. 3 a perspective view of the adjusting collar.

The die block 1 is secured to the bed 2 of the press and has the tubular cutting die 3 thereon. This cutting die is internally shouldered at 4 and 5 and the space between the shoulders is threaded as shown. The

. forming die 6 is externally threaded at its base and its upper end is turned down to fit the inside ofv the cutting die above the shoulder 4. An adjusting collar 7, provided with spanner slots 8-8 in its lower face, fits inside the base of'the cutting die below the shoulder 5, its bottom being flush with the base of the die block.

The forming die 6 has two holes 99 bored into its base and the adjusting collar 7 has two pins 1010 secured to its upper face which pins enter the holes 99 in the forming die.

A small set screw 11 passes through the side of the die block with a fiber plug 12 between its end and the outer face of the adjusting collar 7. g

In use the dieis assembled as shown in Fig. 1 with the set screw 11 turned in until the fiber plug 12 creates a holding friction on the ad'usting collar. The die block is then secure to the press bed by the cap Patented Mar. 1, 1921.

screw 13 with the central opening in the cutting and forming dies in line with the openlng 14 in the press bed. This opening- 14 is of such diameter that about one half of the area of the adjusting collar rests on the bed and the other half projects, over the opening. By passing a spanner wrench through the opening 14 from the back of the bed the adjusting collar may be-turned which causes the forming die tolmove up or down in the cutting die until it is properly adjusted to meet the male die (not shown) due to-the fact that the pin and hole I connection between the adjusting collar and the forming die causes them to revolve to-' gether but leaving'theforming die free to travel up or down the pins."

In this way exact adjustments of the forming die may be quickly and easily e! fected without removing the die block from the press bed and the frictional engagement of the adjusting collar and fiber plug hold the adjustment once it has been obtained.

.I claim 1. An adjustable die forpunch presses comprlsing a die block, an internally threaded, tubular member thereon, an ex? ternally threaded second member within said first member, an adjusting collar within the first member below the second member and means connecting the second member and adjusting collar whereby they revolve together'but approach or recede one from the other during rotation. I r

2. An adjustable die for punch presses comprising 'a die block, an internally' threaded cutting die thereon, an externally threaded formin die within the cutting die provided with p1n holes at its base, an adjusting collar within the cutting die below the forming die and pins thereon entering the pin holes in the forming die.

3. An adjustable die for punch presses such as is defined lnclaim 2, provided with means on the die block for frictionally engaging theadjustingcollar.

In testimony whereof I have afiixed my signature.

ARON JOHNSON. 

